Expansion-coupling for hose.



H. C. BOSTIAN. EXPANSION COUPLING FOR HOSE.

y APPLICATION FILED MAR.2e.'1909, 941,355s Patented NOV. 30, 1909.

5mm/bof.:

alto/Lump FFFCF.

HOMER C. BOSTIAN, DF MILTON, PENNSYLVANIA, ASSIGNOR 0F ONE-THIRD T0BENJA- MIN BUDD CANNON AND ONE-THIRD T0 J. EDWARD HASTINGS AND PENN G.HAST- INes, ALLor MILTON, PENNSYLVANIA.

EXPANSION-COUPLING FOR HOSE.

Specification of Letters Patent.

Application led. March 26, 1909.

Patented Nov. so, isos. Serial No. 485,962.

To all whom it may concern:

Be it known that l, HOMER C. Bos'riAN, a citizen of the United States,and resident of Milton, in the county of Northumberland and State ofPennsylvania, have invented certain new and useful Improvements inExpansioirCouplers for Hose, of which the following is a specification.

This invention relates to pipe couplings having a shank adapted to beinserted on the inside of the'pipe, and more particularly to couplingswhich are used with rubber hose.

The object is to constructa coupling which is simple, inexpensiveandefficient.

The invention consists in a hollow coupling provided with a shank whichis adapted to he inserted in the pipe o-r hose. `This shank is madeexpansible by having slots out therein, and is provided at its end withthreads on itsinterior surface. A threaded conical plug is adapted to bescrewedinto the end of the shank so as to expand it. This plug isprovided with a square hole adapted to be engaged by` a wrench or toolfor the purpose of expanding the shank when it is inserted in the pipe.

Tn the drawings: Figure 1 is a view showing the coupling and itsexpanding plug separated; Fig. 2 is a section showing the coupling inplace in the pipe; Fig. 3 is a view of a form of wrench which may beused for expanding the coupling.

In Figs. 1 and 2, 10 designates the coupling provided with a shank l1,an annular liange 12, and a threaded portion or nipple 13. This threadedportion or nipple 13 is adapted to be screwed into a threaded sleeve orunion 14. The shank l1 is provided with a number of slots 15 cutentirely through the shank and extending from the end in the directionof the flange 12. By thus slotting the shank it is rendered elastic sothat it may be expanded. The shank is interiorly threaded at its end asshown more clearly in Fig. 2. The plug16, which is of conical form, isexteriorly threaded and provided with a square or any other irregularlyshaped hole 17. This plug is adapted to be screwed into the end of theshank so as to expand the same.

In Fig. 3, 18 designatesa wrench pro-` vided with a square end 19 whichlits the aperture 17 of the plug.

The method of attaching this coupling to a pipe is as follows: The plug16 is inserted in the end of the shank 11 and screwed up suii'icientlyso that` it will be held in place. The shank portion is then inserted inthe pipe or hose 2O up to the flange 12. The shank of the wrench 18 isinserted from the nipple end of the cou ling and the plug screwed upuntil the en of the shank 1l has been sufficiently expanded so as tomake a tight joint between the pipe or hose and the coupling. The partswill then he in the position shown in Fig. 2. It will be noticed thatwhen the parts are assembled a continuous passage is formed through thecoupling body and the plug.

This coupling is particularly useful when use-d in connection with airhose, and by providing a union or sleeve 14, two sections of the hosemay be joined together, making an air-tight joint. When used inconnection with pneumatic tools, the nipple may be screwed into a socketon the tool. A nozzle may be connected to the nipple, or this nipple maybe screwed into the main air-pipe line. The hose or pipe 16 may also beprovided with a band of metal located over the expansible shank 11. Thisis a well-known expedient.

Although this invention is particularly useful when used in connectionwith airhose, it is to be understood that it is not limited to such ause, nor is it limited to the particular construction shown.

VVhxat I claim is:

1. f pipe couplin` comprisin an ex ansible shank adaptedj to beinseiited inpthe pipe, and means forming a part of the coupling toexpand said shank.

2. A pipe coupling comprising a hollow expansible shank, and meanslocated within the shank and forming a part of the coupling to expandthe saine.

3. A pipe coupling comprising a hollow expansible shank having on itsinside surface a tapered portion, and a plug coperating with saidtapered portion to expand the shank.

4. A pipe coupling comprising a hollow expansible shank having on itsinside Surgigi face a tapered portion, and a conical plug cooperatingwith the tapered portion to expand the shank.

5. A pipe coupling comprising a hollow expansible shank interiorlythreaded, and means engaging the threads to expand the shank.

6. In a pipe coupling comprising a hollow expansible shank interiorlythreaded, and a conical threaded plug for engaging the thread in theshank to expand the same.

7. A pipe coupling comprising a hollow expansible shank interiorlythreaded, and a conical threaded plug to expand the shank, said plughaving means adapted to be engaged by a removable wrench.

8. A pipe coupling comprising a hollow expansible shank interiorlythreaded, a conical threaded plug having an irregularly shaped holetherein, said plug being adapted to expand the shank.

9. A pipe coupling comprising a hollow shank provided with slots, andmeans forming a part of the coupling to expand the shank.

10. A pipe coupling comprising a hollow shank provided with longitudinalslots and a conical plug engaging the inslde of the shank to expand thesame.

11. A pipe coupling comprising a hollow shank provided with longitudinalslots extending to the end of the shank, said shank being interiorlythreaded, and a conical threaded plug for engaging the threads in thepipe, said plug having a longitudinally extending irregularly shapedhole.

l2. A pipe coupling comprising a threaded nipple and a shank portion, anannular flange connecting the nipple and the shank, said shank beingprovided with longitudinal slots extending to the end of the shank, andwith an internal thread at its end, and a conical threaded plug forengaging the threaded end of the shank, said plug having alongitudinally extending irregularly shaped hole therein.

ln testimony whereof I atlix my signature in presence of two witnesses.

HOMER C. BOSTIAN. Witnesses J. F. GAUGER, JOHN A. IIEFFELFINGER.

